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FIG 1
FIG 2
ANSI S3.19-1974 Table (NRR Table)
A1: Frequency, Hz
125
250
A2: Grand Mean Attenuation, dB
30.1
29.0
A3: Standard Deviation, dB
3.7
3.5
CSA CLASS
AL
EN 352-2:2020 Table (SNR Table)
B1: Frequency, Hz
63
125
250
B2: mF (dB)
26.3
31.2
29.7
B3: sf (dB)
4.4
4.8
4.0
B4: ADVf
26.4
25.7
21.9
H = 30 dB
M = 29 dB
L = 27 dB
Bluetooth
(HFP)
®
Criterion input signal:
Sound output level at maximum input signal:
Usage time for maximum input signal:
FIG 3
500
1000
2000
3150
4000
6300
37.2
36.9
35.8
36.2
36.6
42.7
4.2
4.1
3.9
4.6
5.4
5.2
500
1000
2000
4000
8000
33.7
35.1
33.5
32.6
44.3
6.4
6.7
3.5
3.7
4.0
27.3
28.4
30.0
28.9
40.3
APVf=MF-SF (dB)
-17.7 dBFS
85.3 dB(A) at -14 dBFS
3.7 h at -14 dBFS
Bluetooth
®
Maximum sound level:
Relationship between sound output level and input signal level
Input signal level [dBFS]
FIG 4
SPL [dB(A)]
8000
NRR
Silicone Eartips
45.6
25
4.2
AS/NZ 1270:2020
Foam Eartips
SNR
31
Double Silicone Eartips
HEARING PROTECTOR CLASS 2** Tested to AS/NZS1270,
when selected, used and maintained as specified in
AS/NZS 1269 this protector may be used in noise up
to 110 dBA assuming an 85 dBA criterion. A lower
criterion may require a higher protector class.
(A2DP)
80.0 db(A) at -10 dBFS
-54
-49
-44
-39
70.2
75.2
80.2
82.2
-34
-29
-24
-19
-14
82.3
82.3
82.6
83.0
85.3
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